Spark-plug.



H. H. YOUNG.

SPARK PLUG.

APPLICATION FILED NOV.25,'1912.

4,219. Patented 0ct.20,1914. y

fig- 5- %1T1,VESSES Z6 INVENTOR.

HUGO H. YOUNG,-OF LOUDON'VILLE, OHIO.

SPARK-PLUG.

Specification of Letters Patent.

Application filed November 25,1912. Serial No. 733,490.

To all whom it may concern:

Be it known that I, Huco H. YoUNe, .citi- I zen of the United States, residing at Louin spark plugs.

donville, in the county of Ashland and State of Ohio, have invented certain new and useful Improvements in Spark-Plugs, of which the following is a specification.

This invention relates to an improvement The primary object of the invention is to provide a construction whereby a larger and more intense spark is produced than in the usual form ofplug, the arrangement being such as to roduce a shower of sparks. A further ob ect of the invention is to provide a device of'this character in which the corrosion of the electrodes will be avoided.

Another object of the invention is to provide means for moving the contact surfaces of bothcathode and anode to prevent pitting.

In the drawings: Figure 1 isa side elevation of the plug; Fig. 2 a vertical section; Fig. 3 a view showing the manner in which the lower electrode may be adjusted with respect to the-upper one; Fig. 4 a sectional view showing the manner of mounting the lower ball on the hanger; Fig. 5 a view showing a. slightly modified form of mounting for the ball; Fig. 6 a view showing the manner in which the hanger. may be bent to dispose the lower ball at one side of the upper ball; and Fig. 7 a view showing the lower electrode formed integral-with the hanger.

In the drawings 10 designates the thimble or shell which is threaded at .11 to be received by the threaded opening in the engine cylinder. The shell is interiorly threaded as at 12. and receives the insulated plug 13 which may be formed of porcelain or any other suitable insulating material. A jam nut 14 embraces the nut 13, said jam nut extending within the bore 15 of the shell. A stem or rod 16 extends through the insulated plug, said stem being held in place by the cap 17. This cap is formed with the threaded extension 18. which receives the binding nut 19. l The lower terminal'20 of the rod extends beyond the conical ortion 21 of the plug 13, the wall 22 of t e bore 23 of the shell being rounded adjacent and beyond the conical extension of the plug: A ball 24 is arranged on the lower terminal of the rod,

this ball forming an electrode which is disposed centrally of the bore 23 of the shell, ahplclmrtion of'the ball extending beyond the s e A substantially semi-circular hanger 25 of pliable material has its terminals 26 secured to the shell at diametrically opposite points, a ball 28 being loosely mounted on said hanger intermediate its ends.

When the circuit is made, the spark will.

not be'confined to a small sparking point, the two-large spherical electrodes causing a shower of sparks and consequently a better explosion than should the sparkbe made to take place either between small electrodes or a rounded surface and a spherical electrode.

The many advantages of a. construction of this character will be clearly apparent, as it will be noted that the same will not only produce a more intense and voluminous spark than is usual where small sparking points are used, but the construction is such as to avoid corrosion, owin to the size and configuration of the electro es.

The hanger is pliable and by bending the same, the gap between the electrodes may be varied. It will be seen that a hanger of this character may be so moved that the lower electrode is disposed at one side of the upper electrode and that when in this position the upper electrode may be rotated by rotating therod which supports the same to present difi'erent contact surfaces, thus avoiding pitting. The lower electrode may be loosely mounted on the hanger. Thus, the jar of the engine will cause the constant changing- .of the contact surfaces and pit-ting will be avoided;

It will be noted that the lower electrode may be so mounted on the hanger that 1t must be rotated by hand or by a Wrench and Patented Oct. 20', 1914.

the contact surfaces in this manner changed. w

When the ball is loosely mounted on the hanger it will be noted that it may be moved longitudinally and locked against movement by bending the hanger, which is of pliable material, the hanger being so bent that movement of the ball other than the desired rotation is prevented.

While the invention broadly contemplates the provision of a spherical anode and cathode, the advantages of which have been clearly brought out in the foregoing, it will be apparent that the device has other advantages. which would not be possible were the electrodes'fixedly mounted or limited to a fixed adjustment to avoid pitting.

In Fig. 7 the lower electrode is formed integral with the hanger, it being noted that in this form the hanger may be bent to vary the distance between the electrodes.

\Vhat I claim is;

1. A spark plug including electrodes formed with convex adjacent surfaces and being rotatable, one electrode being adjustable along a line intersecting a line coincident with the axis of rotation of the other electrode. i

2. A spark plug including electrodes formed with rounded convex surfaces, a vertically disposed rotatably mounted support for one of the electrodes, a transversely arranged bar supporting the other electrode, said last named electrode being adjustable along a line intersecting a line coincident with the axis of rotation of the first named electrode.

3. A spark plug including spherical electrodes, and a flexible bar supporting one of said electrodes, said electrode being arranged to move longitudinally of the bar, the bar being flexed at both sides of the elec trode to hold the electrode against movement longitudinally of the bar;

4. A spark plug including electrodes formed with rounded surfaces, a Vertically disposed rotatably mounted support for one of the electrodes, and a transversely arranged bar supporting the other electrode,

said other electrode being rotatably mounted on said bar and disposed to move longitudinally thereof, the bar being flexed at each vertically disposed rotatably mounted support for one of the electrodes, said electrode being mounted concentrically to the axis of such support, and a support for the other electrode extending transversely to the axis of rotation of the first named electrode, the second named electrode being capable of longitudinal adjustment and free rotary movement on its support.

6. A spark plug including spherical electrodes arranged one above the other, a vertically disposed rotatable support for the upper electrode and with which the electrode rotates, said support intersecting the axis of the upper electrode, and a pliable support for the lower electrode whereby the lower electrode may be :adjusted vertically or transversely with relation to the upper electrode, said lower electrode being freely rotatable on its support.

In testimony whereof I affix my signature in presence of two witnesses.

HUGO H. YOUNG. [n s] Witnesses:

H. E. CULnERTsoN, PERCY S'rooKMoN. 

